If there weren't a personal meeting ahead where Real Madrid has an iron opportunity to score three points at the same time and deprive Barcelona of three points, thus reducing the gap to 5 points, I would consider that the championship is already over. Teams that are at the top of the standings rarely lose points, so 8 points difference is a huge distance.
There are no chances that Real Madrid will catch up with Barcelona. If you are focusing on the side that Barcelona will have to lose matches, do you also consider that Madrid can also lose a match or draw and thereby the gap between them and Madrid will increase the more. It is just a two ways thing, what I don't understand is how Barcelona gave Real such a gap to 8 points.
Yes, I understand that Real Madrid can also lose points (for example, in the upcoming game with Atlético), but if we are talking about distance, then in my opinion it is logical that such an unbalanced team as Barcelona should not significantly outperform Real Madrid statistically. In addition, if Xavi planned the peak of form (at least the first one) at the beginning of the tournament, and Ancelotti for the current period, then we should expect Real Madrid to play better now. In general, we are waiting for a personal meeting and everything will be clear.